Built two of these with 1500 watt 120v elements. Will be testing for water proofness tonight. Hopefully will brew with them tomorrow night. Drew inspiration from the various online sources as far as directions go.

In case anyone is wondering about doing the same thing, it does take both going to keep a good rolling boil on a full boil 5 gallon batch (7 gallons). It was a little slower than propane getting from mash out temps up to boil, but it was only about another 10 minutes.

Are you guys using 120v or 240v? I'm guessing 120v.
1500 watts / 120v is 12.5 amps. Most standard circuits in any string (kitchen, bathroom, etc.) usually have a 15 amp breaker and I would be concerned about using 2 heat sticks from the same circuit.